Binding tool

Abstract

A binding tool including a holding and tensioning mechanism, a cutter arm having two operating parts, a driving device for driving the mechanism and a returning force giving mechanism. The tool comprises a handle connected with a handle connecting link operating the driving device and having a cutting operation end in the head; the driving device including a first toggle link, a second toggle link, a slider connecting link and a toggle slider, the slider connecting link being borne at the rear end of the slider and operating the slider against the returning force mechanism, a stopper roller borne by the toggle slider, a sector slider being in contact with and capable of being pushed down by the toggle slider, and a tension roller pivoted to the lower part of the toggle slider, regulated in the downward movement by a regulating guide, and being operated through the handle connecting link contacted with the stopper roller; a switching device having a locking projection on a switching lever borne coaxially with the tension roller and capable of switching and disposing the locking projection in an engaging or disengaging position with the operating part at the rear end of the cutter arm.

I claim: 
     
       1. A binding tool comprising a holding and tensioning means including a movable slide having a rear end part and a front end part and having a binding band holding part in the front end part, a driving part adjacent the rear end part of said slide including a toggle mechanism having at an input side thereof a slide connecting link connected to the rear end part of said slide and including at an output side thereof a toggle slide and arranged so as to push down the toggle slide when driven, the driving part having a rotary fulcrum portion below said toggle mechanism, a sector slide movable downwardly in the rotary fulcrum portion of said driving part and operated by said toggle slide, a switch lever pivoted at a lower end thereof to said sector slide and having a locking projection in an upper part thereof, a cutter arm having at one end a cut producing end and in the other end two operating parts disengageable with said locking projection and rockably pivoted centrally of the arm, a handle having in an upper part thereof a cut producing end operating said cutter arm for cutting and a handle connecting link pivoted at one end in the middle of said handle and connected at the other end with said driving part disengageably with the operation of the toggle slide, whereby when the locking projection is engaged with one of said two operating parts the cutter arm is activated to cut the band under a predetermined tension and when the locking projection is disengaged the cutter arm is activated by the handle to cut the band under a relaxed tension after the band is related.